Does the force field last for a single player turn or a single round around the table. We played as it lasting until the end of a single player turn, but there was some discussion.
If you think of the flow of the Castle Panic games in general, that's not a lot of stuff that is "around the table" based, most of it cycles on the players turn. (For example, you draw new threats at the end of every players turn, threats move at the end of every player's turn, etc.
So Id say, Force Field ends at the end of that player's turn.